Charles w



(No Model.)

0. W. HUNTINGTON. ADJUSTABLE JOINT FOR DISPLAY FRAMES. No. 437,650.

Patented Sept. 30, 1890.

lxhtmmo I UNITED STATES.

PATENT OFFICE.

CHARLES W. HUNTINGTON, OF NORWICH, CONNECTICUT, ASSIGNOR 'IO WILLIAM A. AIKEN, OF SAME PLACE.

ADJUSTABLE JOINT FOR DISPLAY-FRAMES.

SPECIFICATION forming part of Letters Patent No. 437,650, dated September 30, 1890.

Application filed June 14, 1890. Serial N0.355,434. (No model.)

.To all whom it may concern." 4

Be it known that 1, CHARLES W. HUNTING TON, a citizen of the United States, residing at Norwich, in the county of New London and State of Connecticut, have inventeda certain new and useful Improvement in Adjustable Joints for Display-Frames, which improvement is fully set forth and described in the following specification, reference being had to the accompanying sheet of drawings, in which Figure 1 shows portions of an upright and lateral arm connected by a joint of my improved form, and Fig. 2 is a similarview from the rear or opposite side. Fig. 3 is a crosssectional view of said joint on line at a: of Fig. 1; and Figs. 4 and 5 are perspective views of certain parts of said joint, more particularly referred to hereinafter. Fig. 6 shows inner face and edge views of the ratchet-disk of arm 1), and Fig. 7 similar views of the movable ratchet-disk it.

My invention seeks to provide a joint that may be advantageously used in displayframes, head-rests for photographers use, and all articles of like character in which it is desired or necessary to adjust certain parts to difierent positions; and my object is to produce a joint of great strength, that may be readily adjusted, and which is capable of being produced in pleasing design.

In the annexed drawings, the letter a. indicates a rod, which may represent the rigid upright or standard of a display-frame; b, a notched lateral arm of well-known form, and c a collar fitted on upright a and clamped thereto by a screw d or similar device.

It shouldbe understood that the means employed to clamp collar (1 to the upright forms no part of my invention.

The inner end of arm b is formed as a disk b, that is bored centrally and provided on one face with a series of ratchet-teeth 6, cut substantially like those of a face-mill.

On the collar 0 is a disk 0', that has a square central opening 0 and is cupped to form a recess 0 of considerable depth, the outer diameter of disk 0 being the same as that of the disk on arm I), and the diameter of the recess 0 being such that the described toothed projection e may freely enter therein, as illustrated in Fig. 8 of the drawings. The two disk-sections are secured together by a stud f and screw g, the former of which is round adjacent to its head f for a distance equal to the thickness of disk b, and throughout the rest of its length is squared and of such size that it may enter snugly in the corresponding opening 0 in the cupped disk 0'. The squared end of stud f is drilled and tapped to receive the screw g, Whose head is somewhat larger than the end of the stud, as plainly shown. It will now be understood that when the disks are assembled and secured together by stud f and screw g they (the disks) may be partially rotated on each other, but cannot be separated until screw g is removed.

70 denotes a disk having a square central hole of size to fit loosley on squared part of stud f, and having on one face a series of ratchet-teeth adapted to engage and interlock with those of the described teeth on disk b.

' When the several parts of the joint are assembled, disk It is free to slide on stud but is held normally in looking engagement with the companion ratchet-disk by a springm, that is compressed between disk It and the bottom wall of recess 0 To throw the teeth of said disk It out of engagement with those of the companion disk, I have provided a pushbutton 'n, having a stem n',that fits loosely in a central hole in stud f, and is provided with trunnions if, that extend outward through slots f 2 in said stud. When button it is pressed, the trunnions n press back the disk is against the force of spring m, when the arm I) may be lowered. On discontinuing the pressure on button or the spring m immediately acts to bring the ratchet-disks again into locking engagement. When it is desired to raise arm b, it is only necessary to grasp said arm and swing it upward to the desired inclination, the ratchet-teeth meanwhile riding on each other and forcing disk inward against the expansive force of spring m.

My described joint is of simple construction. Most of the operative parts are concealed from view and protected from dust, &c., and the whole device is of pleasing design.

Having described my invention, I claim 1. An adjustable joint consisting of two disks, one being cupped and the other formed with ratchetteeth, as set forth, a springpressed ratchet-disk within said cupped disk, and means, substantially as described, for moving said spring-pressed disk out of engagement with its companion disk, said elefimelnts being combined substantially as speci- 2. In combination with a cupped disk, a disk of corresponding diameter formed with ratch- 1o et-teeth, as set forth, a headed stud with body portion squared to enter a corresponding openstud, and means, as set forth, for moving said I 5 spring-pressed disk out of locking engagement With its companion disk.

CHARLES W. HUNTINGTON.

Witnesses:

FRANK H. ALLEN, ALONZO M. LUTHER. 

